For those who want to read up on studies pertaining to marijuana use the World Health Organization is an interesting place to start. But regardless of findings or facts people will do things they know are bad for them. I'd think the point of a governing entity would be to diminish the societal effects of it's citizen's chosen behavior while respecting the rights of it's citizens to chose said behavior. Our drug war does nothing but make a black market where American money is funneled out of our economy by the billions to cartels and shadow governments throughout the globe. On top of money being removed from our economy we spend billions on fighting drugs. Not only on the front end in prevention, policing and espionage, but on the back end with court costs, prison costs, and the lives of the innocent here and abroad caught in turf wars between rivals, the CIA, the DEA. Plus, who knows what other quasi-governmental/mercenary-type government contractors are financially exploiting the situation. I wouldn't put it past parts of our government like the CIA to sell or transport drugs to fund clandestine operations. If the money didn't come from Congress it wouldn't show up in any audits right? Point being, if drugs were legal the prison industry would lose money. The DEA wouldn't have much work and possibly be disbanded or incorporated into a regulatory body. Pharmaceutical companies would lose money. Alcohol and tobacco companies would lose money. And income from any recreational drug industry would be on the books. I don't think our government wants all it's income on the books. On the other hand, it would be it's own industry. It's product would be taxed. It would need to be packaged and shipped like any other product. We would be paying for a smaller prison population too. Despite spending billions over forty plus years to stop drug use it's actually increased. What sane person would keep throwing money at a problem that only increases the more you fight it?